A box contains 1 red and 3 identical white balls. Two balls are drawn at random in succession without replacement. Write the sample space for this experiment
A box contain 1 red and 3 identical white balls
Let R denote the red ball and W denote the identical white ball
The 2 ball selected at random in succession without replacement
Sample space is
S={RW,WR,WW}
1st ball 2nd ball
R W
W R
W W